data migration to old templates generated by save_as method

circle/storage/migrations/0015_set_is_ready_to_base_images.py

+# -*- coding: utf-8 -*-
+from south.utils import datetime_utils as datetime
+from south.db import db
+from south.v2 import DataMigration
+from django.db import models
+
+import logging
+
+logging.basicConfig(filename='/var/tmp/0015_disk_migration.log',level=logging.INFO)
+logger = logging.getLogger()
+
+class Migration(DataMigration):
+
+    def forwards(self, orm):
+        "Write your forwards methods here."
+        # Note: Don't use "from appname.models import ModelName".
+        # Use orm.ModelName to refer to models in this application,
+        # and orm['appname.ModelName'] for models in other applications.
+        disks = orm.Disk
+        for disk in disks.objects.all():
+            if disk.base is None and disk.destroyed is None:
+                logger.info("Set disk %s (%s) with filename: %s to ready.",
+                            disk.name, disk.pk, disk.filename)
+                disk.is_ready = True
+                disk.save()
+
+
+    def backwards(self, orm):
+        "Write your backwards methods here."
+
+    models = {
+        u'storage.datastore': {
+            'Meta': {'ordering': "[u'name']", 'object_name': 'DataStore'},
+            'hostname': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '40'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '100'}),
+            'path': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '200'})
+        },
+        u'storage.disk': {
+            'Meta': {'ordering': "[u'name']", 'object_name': 'Disk'},
+            'base': ('django.db.models.fields.related.ForeignKey', [], {'blank': 'True', 'related_name': "u'derivatives'", 'null': 'True', 'to': u"orm['storage.Disk']"}),
+            'created': ('model_utils.fields.AutoCreatedField', [], {'default': 'datetime.datetime.now'}),
+            'datastore': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['storage.DataStore']"}),
+            'destroyed': ('django.db.models.fields.DateTimeField', [], {'default': 'None', 'null': 'True', 'blank': 'True'}),
+            'dev_num': ('django.db.models.fields.CharField', [], {'default': "u'a'", 'max_length': '1'}),
+            'filename': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '256'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'is_ready': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'modified': ('model_utils.fields.AutoLastModifiedField', [], {'default': 'datetime.datetime.now'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '100', 'blank': 'True'}),
+            'size': ('sizefield.models.FileSizeField', [], {'default': 'None', 'null': 'True'}),
+            'type': ('django.db.models.fields.CharField', [], {'max_length': '10'})
+        }
+    }
+
+    complete_apps = ['storage']
+    symmetrical = True